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Title: Stable and solubilized active Au atom clusters for selective epoxidation of cis-cyclooctene with molecular oxygen

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms14881· OSTI ID:1361195
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [3]; ORCiD logo [3]
  1. Fudan Univ., Shanghai (China); Northwestern Polytechnical Univ., Shaansi (China)
  2. Northwestern Polytechnical Univ., Shaansi (China); Northwestern Univ., Evanston, IL (United States)
  3. Northwestern Polytechnical Univ., Shaansi (China)
  4. Arizona State Univ., Tempe, AZ (United States)
  5. Northwestern Polytechnical Univ., Shaansi (China); Univ. Federal da Bahia, Bahia (Brazil); Ciencia e Tecnologica da Bahia, Bahia (Brazil)
  6. Northwestern Univ., Evanston, IL (United States)
  7. Univ. Federal da Bahia, Bahia (Brazil)

Here, the ability of Au catalysts to effect the challenging task of utilizing molecular oxygen for the selective epoxidation of cyclooctene is fascinating. Although supported nanometre-size Au particles are poorly active, here we show that solubilized atomic Au clusters, present in ng ml–1 concentrations and stabilized by ligands derived from the oxidized hydrocarbon products, are active. They can be formed from various Au sources. They generate initiators and propagators to trigger the onset of the auto-oxidation reaction with an apparent turnover frequency of 440 s–1, and continue to generate additional initiators throughout the auto-oxidation cycle without direct participation in the cycle. Spectroscopic characterization suggests that 7–8 atom clusters are effective catalytically. Extension of work based on these understandings leads to the demonstration that these Au clusters are also effective in selective oxidation of cyclohexene, and that solubilized Pt clusters are also capable of generating initiators for cyclooctene epoxidation.

Research Organization:
Northwestern Polytechnical Univ., Shaansi (China)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-03ER15457
OSTI ID:
1361195
Journal Information:
Nature Communications, Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Cited By (5)

Nanocarbon Catalysts: Recent Understanding Regarding the Active Sites journal January 2020
Solid-to-liquid phase transitions of sub-nanometer clusters enhance chemical transformation journal November 2019
Generation of gold nanoclusters encapsulated in an MCM-22 zeolite for the aerobic oxidation of cyclohexane journal January 2019
Recent progress in single-atom electrocatalysts: concept, synthesis, and applications in clean energy conversion journal January 2018
Noncontact catalysis: Initiation of selective ethylbenzene oxidation by Au cluster-facilitated cyclooctene epoxidation journal January 2020